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Reload Thread: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

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    How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    I was hoping to buy a 110Ah batt but it wont fit in my car so I may need to go down to an 85Ah... just wanted to know how many watts RMS (at 1.333 ohm impedance before box rise) members here would recommend running off a batt like this.

    Cheers.







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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Alt size? And are you just running 1 batt?



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by bgowdy31 View Post
    Alt size? And are you just running 1 batt?
    80~85Amp alternator, single battery, car made in 1984 so hardly any electrical features in the car.




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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    1k on high side if its class d




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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by BrownVanMan View Post
    1k on high side if its class d
    a 35ah stinger supports 1200



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Roughly 1k. Have to factor in the draw of a front stage amp as well



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by BrownVanMan View Post
    1k on high side if its class d
    Quote Originally Posted by infamous_e46 View Post
    a 35ah stinger supports 1200
    Quote Originally Posted by rebelfromva View Post
    Roughly 1k. Have to factor in the draw of a front stage amp as well
    liking the responses so far, my plans are 180rms tops to mids/highs class ab @4ohms and between 1050-1200w rms class d @1.34ohms... might go upto 1400 if i can but i doubt it

    think I could run that fine?

    like i said the cars almost 30 years old so no electric fuel pumps, EFI, or aircon etc.




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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by RSDXzec View Post
    liking the responses so far, my plans are 180rms tops to mids/highs class ab @4ohms and between 1050-1200w rms class d @1.34ohms... might go upto 1400 if i can but i doubt it

    think I could run that fine?

    like i said the cars almost 30 years old so no electric fuel pumps, EFI, or aircon etc.
    Do the big three.



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by rebelfromva View Post
    Do the big three.
    I have, I did it with 2G wire




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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    I'd say maximum total would be about 1500-1600 wrms but that would be pushing it. How efficient your sub stage amp is will make some difference.



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    What amp hour size your battery is has nothing at all to do with anything except how long you can play with your car not running.
    OMG this forum needs a sticky on this topic so bad it’s insane.
    Every day people ask questions like this about battery size and or alternator size. Yesterday there were four similar topics and there at least twenty per week.
    Battery size has nothing to do with your system while the engine is running and how many batteries you have has nothing to do with anything either.



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by **** View Post
    What amp hour size your battery is has nothing at all to do with anything except how long you can play with your car not running.
    OMG this forum needs a sticky on this topic so bad it’s insane.
    Every day people ask questions like this about battery size and or alternator size. Yesterday there were four similar topics and there at least twenty per week.
    Battery size has nothing to do with your system while the engine is running and how many batteries you have has nothing to do with anything either.
    Then why don't you make this sticky then, since everybody is wrong and you are right.



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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by infamous_e46 View Post
    a 35ah stinger supports 1200
    Battery only does so much. Once you go over what your alt can put out you below 13 volts.




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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by BrownVanMan View Post
    Battery only does so much. Once you go over what your alt can put out you below 13 volts.



    Quote Originally Posted by RyanM923 View Post
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    Re: How many watts RMS could I run nicely off of an 85Ah AGM Deep Cycle batt

    Quote Originally Posted by Better-Action View Post
    I'd say maximum total would be about 1500-1600 wrms but that would be pushing it. How efficient your sub stage amp is will make some difference.
    nice, I hope so, I'll see how it handles 1k on my subs and 180 on my mids/highs before I decide to try pushing my subs a bit harder.

    Quote Originally Posted by **** View Post
    What amp hour size your battery is has nothing at all to do with anything except how long you can play with your car not running.
    OMG this forum needs a sticky on this topic so bad it’s insane.
    Every day people ask questions like this about battery size and or alternator size. Yesterday there were four similar topics and there at least twenty per week.
    Battery size has nothing to do with your system while the engine is running and how many batteries you have has nothing to do with anything either.
    I disagree... my current battery around 20-25ah wont let me use more than around 500watts (with my car running) otherwise my sub amp goes into protect. Imo an AGM batt with more Ah would allow my amp to draw a lot more current instantly when it needs to.
    Last edited by RSDXzec; 03-16-2013 at 03:45 AM.




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